(各自根據具體的poi版本進行相應的替換便可)package com.br.loan.strategy.common.utils;import lombok.extern.slf4j.Slf4j;import org.apache.poi.hssf.usermodel.HSSFCell;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.ss.usermodel.*;import org.apache.poi.xssf.streaming.SXSSFSheet;import org.apache.poi.xssf.streaming.SXSSFWorkbook;import org.apache.poi.xssf.usermodel.XSSFSheet;import org.apache.poi.xssf.usermodel.XSSFWorkbook;import java.io.*;import java.util.*;/** * @Company: * @Author: shaobin.fu * @Date: 2018/9/6 16:33 * @Description: */@Slf4jpublic class Excel { //總行數 private int totalRows = 0; //總列數 private int totalCells = 0; //錯誤信息 private String errorInfo; public Excel() { } //獲得總行數 public int getTotalRows() { return totalRows; } //獲得總行數 public int getTotalCells() { return totalCells; } //獲得錯誤信息 public String getErrorInfo() { return errorInfo; } /** * @描述:驗證excel文件 * @時間:2012-08-29 下午16:27:15 * @參數:@param filePath 文件完整路徑 * @參數:@return * @返回值:boolean */ public boolean validateExcel(String filePath) { /** 檢查文件名是否爲空或者是不是Excel格式的文件 */ if (filePath == null || !(WDWUtil.isExcel2003(filePath) || WDWUtil.isExcel2007(filePath))) { errorInfo = "文件名不是excel格式"; return false; } /** 檢查文件是否存在 */ File file = new File(filePath); if (file == null || !file.exists()) { errorInfo = "文件不存在"; return false; } return true; } /** * @描述:根據文件名讀取excel文件 * @時間:2012-08-29 下午16:27:15 * @參數:@param filePath 文件完整路徑 * @參數:@return * @返回值:List */ public List<List<String>> read(String filePath) { List<List<String>> dataLst = new ArrayList<List<String>>(); InputStream is = null; try { /** 驗證文件是否合法 */ if (!validateExcel(filePath)) { System.out.println(errorInfo); return null; } /** 判斷文件的類型,是2003仍是2007 */ boolean isExcel2003 = true; if (WDWUtil.isExcel2007(filePath)) { isExcel2003 = false; } /** 調用本類提供的根據流讀取的方法 */ File file = new File(filePath); is = new FileInputStream(file); dataLst = read(is, isExcel2003); is.close(); } catch (Exception ex) { ex.printStackTrace(); } finally { if (is != null) { try { is.close(); } catch (IOException e) { is = null; e.printStackTrace(); } } } /** 返回最後讀取的結果 */ return dataLst; } /** * @描述:根據文件名讀取excel文件,以列讀取 * @時間:2012-08-29 下午16:27:15 * @參數:@param filePath 文件完整路徑 * @參數:@return * @返回值:List */ /*public Map<Integer, Integer> readByColumn(String filePath) { Map<Integer, Integer> dataLst = new HashMap<>(); InputStream is = null; try { *//** 驗證文件是否合法 *//* if (!validateExcel(filePath)) { System.out.println(errorInfo); return null; } *//** 判斷文件的類型,是2003仍是2007 *//* boolean isExcel2003 = true; if (WDWUtil.isExcel2007(filePath)) { isExcel2003 = false; } *//** 調用本類提供的根據流讀取的方法 *//* File file = new File(filePath); is = new FileInputStream(file); dataLst = readByColumn(is, isExcel2003); is.close(); } catch (Exception ex) { ex.printStackTrace(); } finally { if (is != null) { try { is.close(); } catch (IOException e) { is = null; e.printStackTrace(); } } } *//** 返回最後讀取的結果 *//* return dataLst; }*/ /** * @描述:根據流讀取Excel文件 * @時間:2012-08-29 下午16:40:15 * @參數:@param inputStream * @參數:@param isExcel2003 * @參數:@return * @返回值:List */ public List<List<String>> read(InputStream inputStream, boolean isExcel2003) { List<List<String>> dataLst = null; try { /** 根據版本選擇建立Workbook的方式 */ Workbook wb = null; if (isExcel2003) { wb = new HSSFWorkbook(inputStream); } else { wb = new XSSFWorkbook(inputStream); } dataLst = read(wb); } catch (IOException e) { e.printStackTrace(); } return dataLst; } /** * @描述:根據流讀取Excel文件,以列讀取 * @時間:2012-08-29 下午16:40:15 * @參數:@param inputStream * @參數:@param isExcel2003 * @參數:@return * @返回值:List */ public Map<Integer, Integer> readByColumn(InputStream inputStream, boolean isExcel2003) { Map<Integer, Integer> dataLst = null; try { /** 根據版本選擇建立Workbook的方式 */ Workbook wb = null; if (isExcel2003) { wb = new HSSFWorkbook(inputStream); } else { wb = new XSSFWorkbook(inputStream); } dataLst = readByColumn(wb); } catch (IOException e) { e.printStackTrace(); } return dataLst; } /** * @描述:讀取數據,以行讀取 * @時間:2012-08-29 下午16:50:15 * @參數:@param Workbook * @參數:@return * @返回值:List<List<String>> */ private List<List<String>> read(Workbook wb) { List<List<String>> dataLst = new ArrayList<List<String>>(); /** 獲得第一個shell */ Sheet sheet = wb.getSheetAt(0); /** 獲得Excel的行數 */ this.totalRows = sheet.getPhysicalNumberOfRows(); /** 獲得Excel的列數 */ if (this.totalRows >= 1 && sheet.getRow(0) != null) { this.totalCells = sheet.getRow(0).getPhysicalNumberOfCells(); } /** 循環Excel的行 */ for (int r = 0; r < this.totalRows; r++) { Row row = sheet.getRow(r); if (row == null) { continue; } List<String> rowLst = new ArrayList<String>(); /** 循環Excel的列 */ for (int c = 0; c < this.getTotalCells(); c++) { Cell cell = row.getCell(c); String cellValue = ""; if (null != cell) { // 如下是判斷數據的類型 switch (cell.getCellType()) { case HSSFCell.CELL_TYPE_NUMERIC: // 數字 cellValue = cell.getNumericCellValue() + ""; break; case HSSFCell.CELL_TYPE_STRING: // 字符串 cellValue = cell.getStringCellValue(); break; case HSSFCell.CELL_TYPE_BOOLEAN: // Boolean cellValue = cell.getBooleanCellValue() + ""; break; case HSSFCell.CELL_TYPE_FORMULA: // 公式 cellValue = cell.getCellFormula() + ""; break; case HSSFCell.CELL_TYPE_BLANK: // 空值 cellValue = ""; break; case HSSFCell.CELL_TYPE_ERROR: // 故障 cellValue = "非法字符"; break; default: cellValue = "未知類型"; break; } } rowLst.add(cellValue); } /** 保存第r行的第c列 */ dataLst.add(rowLst); } return dataLst; } /** * @描述:讀取數據,以列讀取 * @時間:2012-08-29 下午16:50:15 * @參數:@param Workbook * @參數:@return * @返回值:List<List<String>> */ public Map<Integer, Integer> readByColumn(SXSSFWorkbook wb) { Map<Integer, Integer> dataMap = new LinkedHashMap<>(); /** 獲得第一個shell */ Sheet sheet = wb.getSheetAt(0); /** 獲得Excel的行數 */ this.totalRows = sheet.getPhysicalNumberOfRows(); /** 獲得Excel的列數 */ if (this.totalRows >= 1 && sheet.getRow(0) != null) { this.totalCells = sheet.getRow(0).getPhysicalNumberOfCells(); } //從第九列開始 for (int lie = 9; lie <= totalCells; lie++) { //設置爲1,表明不須要刪除,爲0,則刪除。 dataMap.put(lie, 0); } /** 循環Excel的行(不包括第一行) */ for (int r = 1; r < this.totalRows; r++) { Row row = sheet.getRow(r); if (row == null) { continue; } /** 循環Excel的列 */ for (int c = 0; c < this.getTotalCells(); c++) { Cell cell = row.getCell(c); if (null != cell&&StringUtils.isNotEmpty(cell)) { dataMap.put(c+1, 1); } } } return dataMap; } /** * @描述:讀取sheet數據,以列讀取 * @時間:2012-08-29 下午16:50:15 * @參數:@param Workbook * @參數:@return * @返回值:List<List<String>> */ public Map<Integer, Integer> readSheetByColumn(Sheet sheet) { Map<Integer, Integer> dataMap = new LinkedHashMap<>(); /** 獲得第一個shell */ /** 獲得Excel的行數 */ this.totalRows = sheet.getPhysicalNumberOfRows(); /** 獲得Excel的列數 */ if (this.totalRows >= 1 && sheet.getRow(0) != null) { this.totalCells = sheet.getRow(0).getPhysicalNumberOfCells(); } //從第九列開始 for (int lie = 9; lie <= totalCells; lie++) { //設置爲1,表明不須要刪除,爲0,則刪除。 dataMap.put(lie, 0); } /** 循環Excel的行(不包括第一行) */ for (int r = 1; r < this.totalRows; r++) { Row row = sheet.getRow(r); if (row == null) { continue; } /** 循環Excel的列 */ for (int c = 0; c < this.getTotalCells(); c++) { Cell cell = row.getCell(c); if (null != cell&&StringUtils.isNotEmpty(cell)) { dataMap.put(c+1, 1); } } } return dataMap; } /** * 刪除列 * @param sheet * @param columnToDelete */ public void deleteColumn(SXSSFSheet sheet, int columnToDelete) { for (int rId = 0; rId <= sheet.getLastRowNum(); rId++) { Row row = sheet.getRow(rId); for (int cID = columnToDelete; cID <= row.getLastCellNum(); cID++) { Cell cOld = row.getCell(cID); if (cOld != null) { row.removeCell(cOld); } Cell cNext = row.getCell(cID + 1); if (cNext != null) { Cell cNew = row.createCell(cID, cNext.getCellTypeEnum()); cloneCell(cNew, cNext); //Set the column width only on the first row. //Other wise the second row will overwrite the original column width set previously. if (rId == 0) { sheet.setColumnWidth(cID, sheet.getColumnWidth(cID + 1)); } } } } } /** * 右邊列左移 * @param cNew * @param cOld */ private void cloneCell(Cell cNew, Cell cOld) { cNew.setCellComment(cOld.getCellComment()); cNew.setCellStyle(cOld.getCellStyle()); if (CellType.BOOLEAN == cNew.getCellTypeEnum()) { cNew.setCellValue(cOld.getBooleanCellValue()); } else if (CellType.NUMERIC == cNew.getCellTypeEnum()) { cNew.setCellValue(cOld.getNumericCellValue()); } else if (CellType.STRING == cNew.getCellTypeEnum()) { cNew.setCellValue(cOld.getStringCellValue()); } else if (CellType.ERROR == cNew.getCellTypeEnum()) { cNew.setCellValue(cOld.getErrorCellValue()); } else if (CellType.FORMULA == cNew.getCellTypeEnum()) { cNew.setCellValue(cOld.getCellFormula()); } } /** * 讀取第一行的cell數據 */ public List<String> readFirstRow(SXSSFWorkbook wb) { log.info("進入readFirstRow"); List<String> list = new ArrayList<>(); int totalColumn=0; /** 獲得第一個shell */ Sheet sheet = wb.getSheetAt(0); /** 獲得Excel的列數 */ if (sheet.getRow(0) != null) { totalColumn = sheet.getRow(0).getPhysicalNumberOfCells(); log.info("totalColumn:{}",totalColumn); for (int lie = 8; lie < totalColumn; lie++) { log.info("lie:{}",sheet.getRow(0).getCell(lie).getStringCellValue()); list.add(sheet.getRow(0).getCell(lie).getStringCellValue()); } } log.info("readFirst的大小:{}",list.size()); return list; } /*public static void main(String[] args) { File file = new File("C:\\Users\\Bairong\\Desktop\\sjfksj.xlsx"); Excel excel = new Excel(); try { FileInputStream is = new FileInputStream(file); Workbook wb = new XSSFWorkbook(is); Map<Integer, Integer> stringIntegerMap = excel.readByColumn(wb); Iterator<Map.Entry<Integer, Integer>> it = stringIntegerMap.entrySet().iterator(); while (it.hasNext()) { Map.Entry<Integer, Integer> entry = it.next(); System.out.println("key= " + entry.getKey() + " and value= " + entry.getValue()); if (entry.getValue()==0){ excel.deleteColumn(wb.getSheetAt(0),entry.getKey()-1); } } FileOutputStream fileOut = new FileOutputStream(file); wb.write(fileOut); fileOut.close(); //excel.deleteColumn(sheet,1); System.out.println("刪除成功"); } catch (Exception e) { e.printStackTrace(); } }*/}/** * @描述:工具類 * @時間:2012-08-29 下午16:30:40 */class WDWUtil { /** * @描述:是不是2003的excel,返回true是2003 * @時間:2012-08-29 下午16:29:11 * @參數:@param filePath 文件完整路徑 * @參數:@return * @返回值:boolean */ public static boolean isExcel2003(String filePath) { return filePath.matches("^.+\\.(?i)(xls)$"); } /** * @描述:是不是2007的excel,返回true是2007 * @時間:2012-08-29 下午16:28:20 * @參數:@param filePath 文件完整路徑 * @參數:@return * @返回值:boolean */ public static boolean isExcel2007(String filePath) { return filePath.matches("^.+\\.(?i)(xlsx)$"); } public static void main(String[] args) { List list1 = new ArrayList(); List list2 = new ArrayList(); list1.add("乾隆"); list1.add("李世民"); list2.add("康熙"); list2.add("李世"); for(int i=0;i<list1.size();i++){ if (list1.contains(list2.get(i))){ System.out.println("結果爲true"); }else { System.out.println("不等"); } } }}